Siemens 7SR242 - Page 8

7SR242 Duobias Description Of Operation
©2010 Siemens Protection Devices Limited Chapter 1 Page 8 of 52
DUOBIAS-M 7
S
R
2
4
2
□
-
2 □
A □
□
- 0 □
A
0
▲
(continued from previous page) Option C: Standard version - plus
- 24 Overfluxing
- 27/59 Under/overvoltage
- 59N Neutral voltage displacement
- 81 Under/overfrequency
- 37/37G Undercurrent
- 46BC Open circuit
- 46NPS Negative phase sequence overcurrent
- 49 Thermal overload
- 50 Instantaneous phase fault overcurrent
- 50G/50N Instantaneous earth fault
- 51 Time delayed phase fault overcurrent
- 51G/51N Time delayed earth fault
C |
|
|
|
|
|
|
|
|
|
|
|
|
|
Additional Functionality
|
No Additional Functionality
A